Concaves for thresher-cylinders.



v A. ANDERSON. GONGAVES FOR THRESHEB. CYLINDERS.

APPLICATION FILED OUT. 13, 1913.

1,095,693. Patented May 5, 1914,.

- 2 SHEETS-SHEET I 59/ Y \Jfifnzssts SNVSINTOK v uguf Ana/@1500 1 J I Ibi Amr'neya. I

A. ANDERSON. GONGAVES FOR THRESHER CYLINDERS.

APPLICATION FILED OCT. 13, 1913.

1,095,693. Patented May 5, 1914.

2 SHEETS-SHEET 2.

\Jrrwresrs I 2W I 4/70 9715 /7 UNITED STATES PATENT OFFTDEQ AUGUSTANDERSON, OF ST. PAUL, MINNESOTA, ASSIGNOB, BY DIRECT AND MESNEASSIGNMENTS, TO NATIONAL AUTOMATIC CONCAVES AND TOOTH COMPANY, OF ST.IPAUL, MINNESOTA, A CORPORATION OF MINNESOTA CONCAVES FORTHRESI-IER-GYLINDERS.

Specification of LettersPatent.

Patented May 5, 1914.

Application filed October 13, 1913. Serial No. 794,999.

To all whom it may concern Be it known that I, AUGUST ANDERSON, acitizen of the United States, residing at St. Paul, in the county ofRamsey and State of Minnesota, have invented certain new and usefulImprovements in Concaves for Thresher-Cylinders, of whiclrthe followingis a specification.

My invention relates to improvements 1n cylinder concaves for threshers,its object being particularly to provide improved means allowing theeasy and effective adjustment of the concaves to adapt the same tohandling different kinds of grains.

To this end the invention consists in the features of construction,combination, and arrangement of parts hereinafter described and claimed.

In the accompanying drawings forming part of this specification, Figure1 represents a side elevation of a portion of a thresher fitted with myfeatures of improvement; Fig. 2 illustrates a cross section through thecylinder and concaves showing the operating mechanism for the concavesin elevation; Fig. 3 is a detail view of the actuating slide for one ofthe concaves showing the supporting framework broken away; Fig. 4L

is a detail View of one end of my improved concaves; and Fig. 5 is adetail view, broken away, of part of the thresher framework andsupported pawl and ratchet mechanism forming part of my invention.

Referring to the drawings, A represents an ordinary thresher cylindersupported upon a shaft 2 journaled in the sides 3 of a thresher. Thecylinder carries the usual teeth 41-. Arranged below the cylinder arethe concaves B, O, D and E. The concaves B, O, and D are provided withteeth 5 cotipcrating with the cylinder teeth. The concave E isuntoothed. The end concave E is slidable in a curved groove 6 in theconcave supporting frame. The concave supporting frame has fulcrumsupport 8 at the rear of the cylinder and forward of the cylinder issupported upon an eccentric 9 which fits into slots 10 in the frame 7.The eccentrics 9 are supported upon a shaft 11 j ournaled in the sidesof the thresher frame, one end 12 of the shaft being squared to receivean actuating handle and said shaft supporting, adjacent the squared end,a ratchet wheel 13 engaged by the pawl 14. Thus the turning of the shaft11 and supported eccentrics, will turn the concave frame upon itsfulcrum into adjusted relationship with the cylinder. I

The rear untoothed concave E is connected by links 15 with the outerends of the lever arms 16 supported upon the shaft 17 journaled in theside walls of the thresher. One end 18 of the shaft 17 is squared toreceive an actuating handle and supports a ratchet wheel 19 engaged bythe pawl 20. Thus the concave E is adjustable in the groove 6 by theturning of the shaft 17 The inside concaves O and D are similarlysupported upon slides 21 and 21' arranged in pairs, the concaves beingsupported upon the slides through the medium of connected ears 22 and23, respectively. The slides 21 have lmk connection 24 with the outerends of the lever arms 25 supported upon the shaft 26 journaled in thesides of the thresher framework. One end 27 of the shaft 26 is squaredto receive an actuating handle and supports a ratchet wheel 28 whichinterlocks with a pawl 29. Similarly the slides 21 are connected bylinks 30 with the outer ends of the lever arms 31 supported upon a shaft32 j ournaled in the ides of the thresher frame. One end 35 of the shaft32 is squared to receive an actuating handle and supports a ratchetwheel 33 engaged by a pawl 34.

In operation, where certain grain, as wheat, is to be handled, the partswill stand in the position shown in Fig. 2 with all the concavesstanding in alinement in the groove 6. \Vhere in treating other grain asrye or oats it becomes necessary to decrease the number of concaves theconcave D, or both the concaves O and D may be quickly carried out ofthe groove 6 by the actuating of either or both of the shafts 26 and 32.The releasing of any one of the pawls from the corresponding ratchetwheel will allow the associated supporting shaft to be turned by ahandle applied to the squared end of the shaft to ac- I B is heldstationary by the lip 87 By turning the shaft 11 the concavesupportingframe will be turned upon its fulcrum support through the medium of theeccentrics toward and from the cylinder. It thus will be evident that Isecure means by which the concave sections may be very quickly andeasily removed without necessitating the stopping of the machine toallow removal. I also provide a very simple and easy actuating concavesupporting frame.

I claim as my invention:

1. In combination with a thresher cylinder, a plurality of concavessupported adjacent said cylinder, means for sliding one of said concavesout of alinemcnt with the remaining concaves, and means for sliding oneof the remaining concaves into the gap left by the removed concave.

2. In combination with a thresher cylinder, a concave supporting framefulcrumed adjacent said cylinder, means for adjusting said frame uponits fulcrum toward and from the cylinder, a plurality of concavesslidably supported upon said frame adjacent said cylinder, means forcarrying one of said concaves out of alinementwith the remainingconcaves, and means for removing one of the remaining concaves into thegap left by the removed concave.

In combination with a thresher cylinder, a plurality of concavesslidably sup ported in alinement adjacent to said cylinder, means forindependently carrying the central concaves out of alinement with themain concaves, and means for sliding one of the remaining concaves intothe gap left by the removed concaves.

In testimony whereof I affix my signature in presence of two witnesses.

AUGUST ANDERSON.

Witnesses:

H. S. JOHNSON, I-I. SwANsoN- Copies of this patent may be obtained forfive cents each, by addressing the Commissioner of Patents, Washington,D. C.

